When your family was originally added to Geni the name of your great grandmother was 'unknown'. The person who added her name in added her as a second wife. I fixed all the relationships for you and she should be listed as your great grandmother now.
I added my great grandmother and put her entire name in and never did it as a second wife. Someone did go in and change things because there actually was a second "Neche" and merged them. I had to unmerge and re-establish the original links.